Characterization of fine-pitch cadmium telluride detectors for the FOXSI sounding rocket experiment (Conference Presentation)

Juliana Vievering; Lindsay Glesener; P. Subramania Athiray; Sophie Musset; Shin-nosuke Ishikawa; Juan Camilo Buitrago-Casas; Tadayuki Takahashi; Shin Watanabe; Kento Furukawa; Kouichi Hagino; Daniel F. Ryan; Andrew Inglis; Säm Krucker; Steven Christe; Sasha Courtade

doi:10.1117/12.2530107

9 September 2019 Characterization of fine-pitch cadmium telluride detectors for the FOXSI sounding rocket experiment (Conference Presentation)

Juliana Vievering, Lindsay Glesener, P. Subramania Athiray, Sophie Musset, Shin-nosuke Ishikawa, Juan Camilo Buitrago-Casas, Tadayuki Takahashi, Shin Watanabe, Kento Furukawa, Kouichi Hagino, Daniel F. Ryan, Andrew Inglis, Säm Krucker, Steven Christe, Sasha Courtade

Author Affiliations +

Proceedings Volume 11118, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI; 1111813 (2019) https://doi.org/10.1117/12.2530107
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

We present on the detector characterization activities and flight results for fine-pitch (60um) cadmium telluride (CdTe) strip detectors designed for the Focusing Optics X-ray Solar Imager (FOXSI) sounding rocket experiment. FOXSI, optimized for observations in the range 4-20 keV, is the first solar-dedicated instrument to utilize the technology of focusing optics for observing the Sun in hard X-rays. Each of the seven FOXSI optics modules is paired with a semiconductor strip detector from which the energy and position of each incoming photon can be derived. While the first FOXSI experiment (FOXSI-1) flew only silicon (Si) detectors, both of the next two FOXSI sounding rocket experiments (FOXSI-2 and FOXSI-3) upgraded some of the detectors to CdTe (60um pitch) for enhanced efficiency at energies >10 keV. Here we present the measurements and analysis performed to characterize components of the CdTe detector response for FOXSI-2 and FOXSI-3, including the gain, energy resolution, and efficiency. Additionally, we explore the effects of charge sharing for these fine-pitch detectors and describe how these effects are accounted for in our calibration and data analysis. Results from spectral analysis of a solar microflare using CdTe data from the FOXSI-2 flight will be shown.

Conference Presentation

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Juliana Vievering, Lindsay Glesener, P. Subramania Athiray, Sophie Musset, Shin-nosuke Ishikawa, Juan Camilo Buitrago-Casas, Tadayuki Takahashi, Shin Watanabe, Kento Furukawa, Kouichi Hagino, Daniel F. Ryan, Andrew Inglis, Säm Krucker, Steven Christe, and Sasha Courtade "Characterization of fine-pitch cadmium telluride detectors for the FOXSI sounding rocket experiment (Conference Presentation)", Proc. SPIE 11118, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI, 1111813 (9 September 2019); https://doi.org/10.1117/12.2530107

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KEYWORDS

Sensors

Rockets

Cadmium

X-ray optics

Silicon

Imaging systems

X-ray characterization

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